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32 | |
32 | |
33 | #include <inttypes.h> |
33 | #include <inttypes.h> |
34 | |
34 | |
35 | /* many compilers define _GNUC_ to some versions but then only implement |
35 | /* many compilers define _GNUC_ to some versions but then only implement |
36 | * what their idiot authors think are the "more important" extensions, |
36 | * what their idiot authors think are the "more important" extensions, |
37 | * causing enourmous grief for some better fake benchmark numbers or so. |
37 | * causing enourmous grief in return for some better fake benchmark numbers. |
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38 | * or so. |
38 | * we try to detect these and simply assume they are not gcc - if they have |
39 | * we try to detect these and simply assume they are not gcc - if they have |
39 | * an issue with that they should have done it right in the first place. |
40 | * an issue with that they should have done it right in the first place. |
40 | */ |
41 | */ |
41 | #ifndef ECB_GCC_VERSION |
42 | #ifndef ECB_GCC_VERSION |
42 | # if defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__llvm__) |
43 | # if defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__llvm__) |
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95 | /* booleans, not the expression. */ |
96 | /* booleans, not the expression. */ |
96 | #define ecb_unlikely(expr) ecb_expect (!!(expr), 0) |
97 | #define ecb_unlikely(expr) ecb_expect (!!(expr), 0) |
97 | #define ecb_likely(expr) ecb_expect (!!(expr), 1) |
98 | #define ecb_likely(expr) ecb_expect (!!(expr), 1) |
98 | |
99 | |
99 | /* try to tell the compiler that some condition is definitely true */ |
100 | /* try to tell the compiler that some condition is definitely true */ |
100 | #define ecb_assume(cond) do { if (!(cond)) unreachable (); } while (0) |
101 | #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0) |
101 | |
102 | |
102 | /* count trailing zero bits and count # of one bits */ |
103 | /* count trailing zero bits and count # of one bits */ |
103 | #if ECB_GCC_VERSION(3,4) |
104 | #if ECB_GCC_VERSION(3,4) |
104 | #define ecb_ctz32 (x) __builtin_ctz (x) |
105 | #define ecb_ctz32 (x) __builtin_ctz (x) |
105 | #define ecb_popcount32 (x) __builtin_popcount (x) |
106 | #define ecb_popcount32 (x) __builtin_popcount (x) |
106 | #else |
107 | #else |
107 | ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; |
108 | ECB_HEADER_INLINE int ecb_ctz32 (uint32_t x) ecb_const; |
108 | ECB_HEADER_INLINE |
109 | ECB_HEADER_INLINE |
109 | ecb_ctz32 (uint32_t x) |
110 | ecb_ctz32 (uint32_t x) |
110 | { |
111 | { |
111 | int r = 0; |
112 | int r = 0; |
112 | |
113 | |